CN103956431B - A kind of organic-inorganic planar heterojunction solar cell of solution processing and its preparation - Google Patents

A kind of organic-inorganic planar heterojunction solar cell of solution processing and its preparation Download PDF

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CN103956431B
CN103956431B CN201410181380.3A CN201410181380A CN103956431B CN 103956431 B CN103956431 B CN 103956431B CN 201410181380 A CN201410181380 A CN 201410181380A CN 103956431 B CN103956431 B CN 103956431B
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inorganic
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CN103956431A (en
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叶轩立
黄飞
胡志诚
薛启帆
孙辰
曹镛
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South China University of Technology SCUT
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/50—Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/10—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising heterojunctions between organic semiconductors and inorganic semiconductors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10—Deposition of organic active material
    • H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention belongs to photoelectric device technical field, a kind of the organic-inorganic planar heterojunction solar cell and its solution preparation for processing of solution processing are disclosed.The solar cell includes substrate, anode, anode interface layer, photoactive layer, cathode interface layer and the negative electrode stacked gradually；The material of described photoactive layer is to dissolve in solvent to have the inorganic material of perovskite structure, and can improve performance by adding polymeric additive.The invention provides the perovskite organic-inorganic hybrid material that a kind of photoactive layer uses solution processable, the planar heterojunction solar cell device that anode interface layer and cathode interface layer are processed using organic material solution.This method is effectively improved energy consumption and large area production problem in battery device processing, obtains higher efficiency；Overcoming prior art needs the deficiency of high temperature process inorganic material, and the high shortcoming of material cost in organic photovoltaic cell.It can be applied as a kind of new material and method in solar cell.

Description

A kind of organic-inorganic planar heterojunction solar battery of solution processing and its preparation
Technical field
The invention belongs to photoelectric device technical field, more particularly to a kind of organic-inorganic planar hetero-junctions of solution processing Solar cell and its solution preparation for processing.
Background technology
With year by year increase of the whole world for energy demand, the increasingly depleted of the traditional energy such as oil, coal, and to protecting The need for protecting ball ecological environment, it is inexhaustible that research is concentrated on hydrogen, solar energy etc. by the increasing scientist in the whole world Nexhaustible renewable and clean energy resource.
The solar cell based on inorganic material such as ripe inorganic silicon, GaAs, indium phosphide is commercially accounted for There is leading position, it is high for the requirement of material purity yet with it, the problems such as high energy consumption and pollution can be produced in process, And its price is very expensive, therefore in the today for pursuing low cost and environmental protection, its large-scale application is restricted.
Dye-sensitized solar cells are after the beginning of the nineties in last century achieves 12% high efficiency, and its application is constantly subjected to envelope The obstruction of dress problem.The solid electrolyte and the polymer hole material of doping developed in recent years can be very good to solve dyestuff The encapsulation problem of sensitized cells, but its efficiency also decreases.In addition, dye-sensitized solar cells need in process High-temperature process TiO2Presoma, convert it into TiO2Inorganic semiconductor.This 2 points are dye-sensitized solar cells commercializations Major obstacle in process.
Hybrid inorganic-organic semi-conducting material with perovskite structure start in last century it is gradually of interest by people, It possesses mobility height, good absorbing, and the advantage that can be processed using various ways.It is high that the researcher of early stage focuses on its mobility Etc. feature, the devices such as the transistor of correlation are prepared for.And in recent years, with gradually going deep into for research, gradually there is scholar to start Dye-sensitized cell is prepared using the hybrid inorganic-organic materials of perovskite structure., Tsutomu Miyasaka researchs in 2009 The hybrid inorganic-organic materials of perovskite structure are prepared dye-sensitized solar cells by group as photoactive layer first.Its efficiency 3.81% (J.Am.Chem.Soc.2009,131,6050) is reached.
High temperature is needed in dye-sensitized solar cells preparation process by TiO2Presoma change into inorganic semiconductor, and Efficient battery device needs to prepare active layer using the method for evaporation, and preparation technology is complex.By contrast, You Jitai Positive electricity pond can use low temperature whole soln processing method, and this point can not only cause energy consumption to be greatly reduced, moreover it is possible to realize Large area is produced.In addition, organic photovoltaic cell can also prepare flexible device, light quality, the need for can meeting difference.Mesh Its preceding peak efficiency is more than 10% (Nat.Commun.2013,4,1446).But, organic photovoltaic cell material production cost is high, It is difficult to industrialization batch production.
The content of the invention
In order to overcome the shortcomings of that above-mentioned inorganic material in the prior art needs the shortcoming and organic material cost of high temperature process high, The primary and foremost purpose of the present invention is to provide a kind of organic-inorganic planar heterojunction solar battery of solution processing.The solar cell Photoactive layer is prepared by solution processing method, with high performance perovskite structure, realizes that the cryogenic fluid of solar cell adds The addition of polymeric additive in work, and photoactive layer, greatly improves the open-circuit voltage and device performance of solar cell.
Another object of the present invention is to provide a kind of organic-inorganic planar heterojunction solar battery of above-mentioned solution processing Solution preparation for processing.
The purpose of the present invention is realized by following proposal：
A kind of organic-inorganic planar heterojunction solar battery of solution processing, including substrate, anode, the sun stacked gradually Pole boundary layer, photoactive layer, cathode interface layer and negative electrode.
The material of described photoactive layer is to dissolve in solvent to have the inorganic material of perovskite structure.
Described photoactive layer is compound A and compound B mol ratios are 1:1~10:1 blend.
The compound A is at least one of halogen-containing organic salt or inorganic salts, preferably following compound： CH3NH3I、CH3NH3Br、CH3NH3Cl、CH3CH2NH3I、CH3CH2NH3Br、CH3CH2NH3Cl、CH3CH2CH2NH3I、 CH3CH2CH2NH3Br、CH3CH2CH2NH3Cl、CsI、CsBr、CsCl、CH(NH2)2I、CH(NH2)2Br、CH(NH2)2Cl、CH3CH (NH2)2I、CH3CH(NH2)2Br、CH3CH(NH2)2Cl。
Described compound B is at least one of halogen-containing metal inorganic salt, preferably following compound：PbI2、 PbBr2、PbCl2、SnI2、SnBr2、SnCl2、GeI2、GeBr2、GeCl2。
The present invention also provides a kind of Solution processing techniques of the photoactive layer, specific as follows：Compound A and compound B is mixed in proportion, is dissolved in after organic solvent, heating response, is coated in anode interface layer formation photoactive layer.
Described organic solvent be preferably cyclohexanone, cyclopentanone, gamma-butyrolacton, δ-valerolactone, gamma-valerolactone, ε-oneself in At least one of ester, N,N-dimethylformamide, dimethyl acetamide, dimethyl sulfoxide (DMSO) and 1-METHYLPYRROLIDONE.
Described heating response preferably reacts 12h at 60 DEG C.
The method of the coating can be rotation Tu, brushing, spraying, leaching Tu, roller Tu, silk-screen printing, printing or inkjet printing side Formula.
Photoactive layer in the organic-inorganic planar heterojunction solar battery of the solution processing of the present invention is high performance calcium Perovskite like structure, and can be prepared by solwution method, efficient solar cell can be obtained.
In order to preferably improve the open-circuit voltage for the organic-inorganic planar heterojunction solar battery that the solution of the present invention is processed And device performance, a series of polymeric additives can be added in photoactive layer.
Described polymeric additive is the polymerization with linear structure or branched structure dissolved in organic solvent Thing.
Preferably, described polymeric additive has formula (I)~at least one of structure shown in (VI)：
Wherein, n is 1~100000000 natural number；R1For the straight chain with 1~6 carbon atom, side chain, alkoxy Chain, one or more of carbon atoms can be replaced by oxygen atom, hydroxyl, amino, aryl, ester group, carbonyl；R2、R3For hydrogen atom Or the straight chain with 1~20 carbon atom, side chain, cyclic alkyl chain, oxyalkyl chain, wherein one or more carbon atoms can be by oxygen Atom, hydroxyl, amino, aryl, ester group, carbonyl substitution.
The polymeric additive is preferably the P2O with following structure.
The amount of polymeric additive used be compound A and compound B mass and 0.5~10%.
The polymeric additive can be artificial controlled syntheses, also can be commercially produced product.
Preferably, above-mentioned Solution processing techniques prepare photoactive layer, can be polymeric additive and compound A, compound B It is redissolved, coats after mixing.
Polymeric additive is incorporated into photoactive layer, can effectively improve the film forming of photoactive layer film.This Invention polymeric additive used have with structure as solvent, pass through the interaction with solvent and and photoactive layer Interaction of the material in film forming, polymeric additive can significantly improve the film forming of photoactive layer film, its The use of invention polymeric additive can significantly improve the open-circuit voltage and energy conversion efficiency of battery device.
In solar cell of the present invention, the cathode interface layer is preferably carbon 60 and its derivative (such as [6,6]-phenyl-C61- Methyl butyrate), carbon 70 and its derivative (such as [6,6]-phenyl-C71- methyl butyrates), conjugated polymer, inorganic semiconductor receive At least one of rice, graphene and its derivative.
Cathode material is preferably aluminium, silver, gold, calcium/aluminium alloy or calcium/silver alloy.
Anode interface layer of the present invention is preferably conjugatd polymerses (such as poly- 3,4- ethylenedioxy thiophenes/polyphenyl second Alkene sulfonate) or inorganic semiconductor.Anode interface layer can improve the compound interface layer after light absorbs for addition nano particle.
Anode of the present invention is preferably metal, metal oxide (such as indium tin oxide conductive film (ITO), titanium dioxide of adulterating Tin (FTO), zinc oxide (ZnO), indium gallium zinc oxide (IGZO)) and at least one of graphene and its derivative.
Substrate of the present invention is preferably glass, flexible material (such as polyimides, polyethylene terephthalate, second Alkene terephthalate, PEN or other polyester materials), metal, in alloy and stainless steel film extremely Few one kind.
The present invention also provides a kind of solution processing side of the organic-inorganic planar heterojunction solar battery of above-mentioned solution processing Method, comprises the following steps：
(1) in the anode surface spin coating last layer anode interface layer being coated on substrate；
(2) one layer of photoactive layer is coated using solution processing method in anode interface layer；
(3) one layer of cathode interface layer is coated using solution processing method on photoactive layer；
(4) the evaporation layer of metal layer on cathode interface layer, is used as negative electrode.
The present invention innovatively combines the planar heterojunction solar cell based on perovskite hybrid inorganic-organic materials There is provided the perovskite hybrid inorganic-organic material that a kind of photoactive layer uses solution processable with the advantage of organic photovoltaic cell The planar heterojunction solar cell device that material, anode interface layer and cathode interface layer are processed using organic material solution.This kind is tied The energy consumption and large area production problem that can effectively improve in battery device processing are closed, and higher efficiency can be obtained. Compared to inorganic solar cell and dye-sensitized solar cells, overcoming needs the shortcoming of high temperature process inorganic material, compared to having Machine solar cell, overcomes the high shortcoming of its material cost.It can be answered as a kind of new material and method in solar cell With.
The present invention has the following advantages and beneficial effect relative to prior art：
(1) present invention prepares solar cell using cryogenic fluid process technology, and preparation technology is simple, and less energy consumption is prepared into This is low.
(2) present invention using hybrid inorganic-organic materials as photoactive layer, its visible ray and near infrared region have compared with Wide absorption, and its absorption coefficient is high, better than most of organic materials.
(3) present invention can obtain the higher solar cell performance of efficiency using inorganic material as photoactive layer, add After polymeric additive, the open-circuit voltage and energy conversion efficiency of device can be significantly improved.
Brief description of the drawings
Fig. 1 for the organic-inorganic planar heterojunction solar battery of the present invention structural representation, wherein, 1 be substrate, 2 be Anode, 3 be anode interface layer, 4 be photoactive layer, 5 be cathode interface layer, 6 be negative electrode.
Fig. 2 is photoactive layer (CH of the invention3NH3PbI3) study of ultraviolet-visible-near infrared.
Fig. 3 is photoactive layer (CH of the invention3NH3PbI3) luminescence generated by light spectrogram.
Fig. 4 is organic-inorganic planar heterojunction solar battery of the invention (with CH3NH3PbI3For photoactive layer) outer amount Sub- efficiency.
Fig. 5 is photoactive layer (CH of the invention3NH3PbI3) x-ray film diffraction pattern.
Fig. 6 is organic-inorganic planar heterojunction solar battery of the invention (with CH3NH3PbI3For photoactive layer) addition is not The scanning electron microscope (SEM) photograph of photoactive layer polymeric additive in proportion.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited In this.
Embodiment 1：The preparation of photoactive layer material
The CH of the compound A3NH3I、CH3NH3Br、CH3NH3Cl、CH3CH2NH3I、CH3CH2NH3Br、CH3CH2NH3Cl、 CH3CH2CH2NH3I、CH3CH2CH2NH3Br、CH3CH2CH2NH3Cl、CH(NH2)2I、CH(NH2)2Br、CH(NH2)2Cl、CH3CH (NH2)2I、CH3CH(NH2)2Br、CH3CH(NH2)2Cl.Synthesis according to document (J.Am.Chem.Soc.2012,134,17396- 17399) method in is prepared.
CH3NH3PbI3Synthesis by by CH3NH3I and PbI2It is codissolved in reacting in gamma-butyrolacton or other organic solvents Generation, it is specific as follows：
Take CH3NH3I (32mg) and PbI2(93mg) blending is dissolved in 1mL gamma-butyrolactons, is heated to 60 DEG C, stirring 12 is small When obtain photoactive layer material.
Preparing for photoactive layer material containing polymeric additive is as follows：
CH is added into above-mentioned solution3NH3I and PbI20.5~10wt% of gross mass polymeric additive, at 60 DEG C Lower heating, slow mechanism dissolved is to obtain the photoactive layer material containing polymeric additive.
CH3NH3PbIxCl3-xAnd CH3NH3PbIxBr3-x(x is less than 3, more than preparation 0), respectively by CH3NH3I and PbCl2、PbBr2It is blended in dissolution solvent, heating stirring is obtained, according to required x ratios, suitable adjustment raw material dosage ratio is obtained.
Other compounds A and compound B any combination obtains the preparation method of photoactive layer material ibid.
Embodiment 2：The preparation of organic-inorganic heterogeneous solar cell：
By ITO electro-conductive glass, square resistance~20 Europe/square centimeter, 15 millimeters × 15 millimeters square pieces of pre-cut.Use successively Acetone, micron level semiconductor special purpose detergent, deionized water, isopropanol are cleaned by ultrasonic, and it is standby to be placed in constant temperature oven after nitrogen purging With.Before use, ito glass piece in oxygen plasma etch instrument with plasma bombardment 10 minutes.PEDOT:PSS aqueous dispersions (about 1%) is purchased from Bayer companies, and cushion uses sol evenning machine (KW-4A) high speed spin coating, and thickness is determined by solution concentration and rotating speed It is fixed, surveyed and monitored with surface profiler (Tritek companies Alpha-Tencor-500 types).After film forming, in constant-temperature vacuum baking oven Drive away solvent residues, perpendicular film.PEDOT is got rid of on ITO substrates:The PSS ran of thickness 40 is preferred.Cathode interface layer by One layer of PC of photoactive layer surface spin coating61BM layers obtain, PC61BM solution is molten by chlorobenzene, dichloro-benzenes, toluene, chloroform, dimethylbenzene etc. Agent is configured, and concentration range is 1~20mg/mL.
Device battery structure of the present invention on ITO as shown in figure 1, revolve the thick PEDOT of one layer of 40nm of Tu:PSS films, so Configuration quality concentration is 10% photoactive layer material (solvent is gamma-butyrolacton) afterwards, and being revolved Tu under 3000rpm rotating speed arrives PEDOT:In PSS layer, then 100 DEG C of heating anneal 15min, are then revolving the thick PC of one layer of 25nm of Tu thereon61BM layers.Finally adopt One layer of aluminium electrode is deposited with the method for evaporation.Photoactive layer material is the CH that embodiment 1 is prepared3NH3PbI3。
Or 0.5~10wt% polymeric additive P2O is added in photoactive layer material, then carry out spin coating.
Ultraviolet-visible light-near infrared spectrum and photoluminescence spectrum scanning are carried out to the photoactive layer prepared, as a result See Fig. 2 and Fig. 3.External quantum efficiency test is carried out to the device battery prepared, Fig. 4 is as a result seen.To photoactive layer (CH3NH3PbI3) x-ray film diffraction pattern is carried out, as a result see Fig. 5.To DMF dicyandiamide solution, different P2O add The battery device of dosage carries out photoelectric device performance measurement, the results are shown in Table 1.Different solvents system is obtained, different polymer The photoactive layer of additive amount is scanned electron microscopic observation, as a result sees Fig. 6.
The battery device performance indications of the difference P2O additions of table 1
Voc(V) Jsc(mA/cm2) FF (%) PCE (%)
0wt%P2O 0.71 7.47 44.6 2.37
1wt%P2O 0.93 7.84 67.3 4.91
1.5wt%P2O 1.07 8.46 64.5 5.83
3wt%P2O 1.1 6.8 62.3 4.66
5wt%P2O 1.1 7.04 54.5 4.22
7wt%P2O 1.01 2.55 42.4 1.09
From table 1 and Fig. 6, the organic-inorganic heterogeneous solar cell that the present invention is prepared can be added by changing Plus the consumption of agent improves the filming performance and device performance of perovskite material, and the increasing of the consumption with polymeric additive Plus, the filming performance and device performance of the photoactive layer material of gained are improved, wherein open-circuit voltage and device Efficiency highest can be respectively increased up to 54% and 146.
Embodiment 3：The photovoltaic performance of the organic-inorganic heterogeneous solar cell of different photoactive layer materials
To respectively with CH3NH3PbI3, CH3NH3PbIxCl3-xAnd CH3NH3PbIxBr3-x(x be less than 3, more than 0) be photolytic activity The photovoltaic performance for the organic-inorganic heterogeneous solar cell that layer material is prepared is measured, and the results are shown in Table 2.
The battery device performance indications of the different photoactive layer materials of table 2
Voc(V) Jsc(mA/cm2) FF (%) PCE (%)
CH3NH3PbI3 0.71 7.47 44.6 2.37
CH3NH3PbIxCl3-x 0.94 10.19 64.9 6.21
CH3NH3PbIxBr3-x 1.01 2.55 42.4 1.09
From table 2, by changing the component of active layer material, wherein bromo element or content of Cl element, Ke Yiyou are improved Effect improves device performance.
From embodiment 1~3, organic-inorganic heterogeneous solar cell of the invention can be by Solution processing techniques system It is standby to obtain, and by adding photoactive layer polymeric additive, can significantly improve the filming performance of perovskite material, improve The open-circuit voltage of device, and finally improve the opto-electronic conversion performance of device.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (7)

1. a kind of organic-inorganic planar heterojunction solar battery of solution processing, it is characterised in that including stack gradually substrate, Anode, anode interface layer, photoactive layer, cathode interface layer and negative electrode；
The material of described photoactive layer is to dissolve in solvent to have the inorganic material of perovskite structure；
Contain a series of polymeric additives in described photoactive layer；Described polymeric additive is to dissolve in organic solvent In the polymer with linear structure or branched structure；
Described polymeric additive is the P2O with following structure：
The organic-inorganic planar heterojunction solar battery of the solution processing is prepared by the method comprised the following steps：
(1) in the anode surface spin coating last layer anode interface layer being coated on substrate；
(2) one layer of photoactive layer is coated using solution processing method in anode interface layer；
(3) one layer of cathode interface layer is coated using solution processing method on photoactive layer；
(4) the evaporation layer of metal layer on cathode interface layer, is used as negative electrode.
2. the organic-inorganic planar heterojunction solar battery of solution processing according to claim 1, it is characterised in that：Institute The photoactive layer stated is compound A and compound B mol ratios are 1:1~10:1 blend；The compound A is halogen-containing Organic salt or inorganic salts；Described compound B is halogen-containing metal inorganic salt.
3. the organic-inorganic planar heterojunction solar battery of solution processing according to claim 2, it is characterised in that：Institute It is at least one of following compound to state compound A：CH3NH3I、CH3NH3Br、CH3NH3Cl、CH3CH2NH3I、 CH3CH2NH3Br、CH3CH2NH3Cl、CH3CH2CH2NH3I、CH3CH2CH2NH3Br、CH3CH2CH2NH3Cl、CsI、CsBr、CsCl、 CH(NH2)2I、CH(NH2)2Br、CH(NH2)2Cl、CH3CH(NH2)2I、CH3CH(NH2)2Br、CH3CH(NH2)2Cl；The chemical combination Thing B is at least one of following compound：PbI2、PbBr2、PbCl2、SnI2、SnBr2、SnCl2、GeI2、GeBr2、GeCl2。
4. the organic-inorganic planar heterojunction solar battery of solution processing according to claim 1, it is characterised in that：Institute Photoactive layer is stated to be obtained by Solution processing techniques, it is specific as follows：Compound A and compound B are mixed in proportion, are dissolved in organic molten After agent, heating response, anode interface layer formation photoactive layer is coated in.
5. the organic-inorganic planar heterojunction solar battery of solution processing according to claim 4, it is characterised in that：Institute The organic solvent stated is cyclohexanone, cyclopentanone, gamma-butyrolacton, δ-valerolactone, gamma-valerolactone, 6-caprolactone, N, N- dimethyl At least one of formamide, dimethyl acetamide, dimethyl sulfoxide (DMSO) and 1-METHYLPYRROLIDONE；Described heating response is 60 12h is reacted at DEG C.
6. the organic-inorganic planar heterojunction solar battery of solution processing according to claim 1, it is characterised in that：Institute With the amount of polymeric additive be compound A with compound B mass and 0.5~10%.
7. the organic-inorganic planar heterojunction solar battery of solution processing according to claim 1, it is characterised in that：Institute The cathode interface layer stated is carbon 60 and its derivative, carbon 70 and its derivative, conjugated polymer, inorganic semiconductor nanometer, graphite At least one of alkene and its derivative；Described cathode material is aluminium, silver, gold, calcium/aluminium alloy or calcium/silver alloy；Described Anode interface layer is conjugatd polymerses or inorganic semiconductor；The anode be metal, metal oxide and graphene and its At least one of derivative；Described substrate is at least one of glass, flexible material, metal and alloy firm.
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